<template>
	<view class="cart-container" v-if="cart.length !== 0">
		<view>
			<!-- 收获地址 -->
			<my-address></my-address>

			<!-- 购物车商品列表的标题区域 -->
			<view class="cart-title">
				<!-- 左侧的图标 -->
				<uni-icons type="shop" size="18"></uni-icons>
				<!-- 描述文本 -->
				<text class="cart-title-text">购物车</text>
			</view>

			<!-- 购物车列表 -->
			<uni-swipe-action>
				<block v-for="(item, index) in cart" :key="index">
					<uni-swipe-action-item :rightOptions="rightOptions" @click="swipeActionClickHandler(item)"
						:auto-close="false">
						<my-goods :goods="item" @radio-change="radioChangeHandler" :showRadio="true" :showNum="true"
							@num-change="numberChangeHandler" @on-jump="jumpGoodsDetail"></my-goods>
					</uni-swipe-action-item>
				</block>
			</uni-swipe-action>
			<!-- 结算区域 -->
			<my-settle></my-settle>

		</view>
	</view>
	<!-- 空白购物车区域 -->
	<view class="empty-cart" v-else>
		<image src="/static/cart_empty@2x.png" class="empty-img"></image>
		<text class="tip-text">空空如也~</text>
	</view>

</template>

<script>
	// 导入自己封装的 mixin 模块
	import badgeMix from '@/mixins/tabbar-badge.js'
	import {
		mapState,
		mapMutations
	} from 'vuex'
	export default {
		// 将 badgeMix 混入到当前的页面中进行使用
		mixins: [badgeMix],
		data() {
			return {
				rightOptions: [{
					text: '删除', // 显示的文本内容
					style: {
						backgroundColor: '#e85953' // 按钮的背景颜色
					}
				}]
			};
		},
		computed: {
			...mapState('m_cart', ['cart'])
		},
		methods: {
			...mapMutations('m_cart', ['updateGoodsState', 'updateGoodsCount', 'removeGoodsById']),
			radioChangeHandler(goods) {
				// 调用vuex改变状态方法
				// console.log(goods) // 输出得到的数据 -> {goods_id: 395, goods_state: false}
				this.updateGoodsState(goods)
			},
			// 调用vuex改变商品数量方法
			numberChangeHandler(goods) {
				this.updateGoodsCount(goods)
			},
			// 点击了滑动操作按钮:删除
			swipeActionClickHandler(goods) {
				this.removeGoodsById(goods)
			},
			// 点击对应的商品跳转到详情页面
			jumpGoodsDetail(goods_id) {
				uni.navigateTo({
					url: `/subpkg/goods_detail/goods_detail?goods_id=${goods_id}`
				})
			}
		}
	}
</script>

<style lang="scss">
	.cart-container {
		background-color: white;
		// height: 100%; // 参考下面的注意说明
		padding-bottom: 50px;

		.cart-title {
			height: 80rpx;
			display: flex;
			align-items: center;
			padding-left: 12rpx;
			border-bottom: 1px solid #efefef;

			.cart-title-text {
				margin-left: 20rpx;
			}
		}

		.goods-item {
			// 让 goods-item 项占满整个屏幕的宽度
			width: 750rpx;
			// 设置盒模型为 border-box
			box-sizing: border-box;
			display: flex;
			padding: 10px 5px;
			border-bottom: 1px solid #f0f0f0;
		}

		::v-deep .uni-swipe_button {
			padding: 0 10px;
		}
	}

	.empty-cart {
		display: flex;
		flex-direction: column;
		align-items: center;
		padding-top: 150px;

		.empty-img {
			width: 90px;
			height: 90px;
		}

		.tip-text {
			font-size: 12px;
			color: gray;
			margin-top: 15px;
		}
	}
</style>
